D-异抗坏血酸钠对硫氧镁水泥性能的影响  

Effect of D-Sodium Erythorbate on Properties of Magnesium Oxysulfate Cement

作　　者：马媛 许峰[1] 马健岩[1] 于礼仪 周业淇 丁向群[1] 张曙 王宁伟 MA Yuan;XU Feng;MA Jianyan;YU Liyi;ZHOU Yeqi;DING Xiangqun;ZHANG Shu;WANG Ningwei(School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang 110000,China;Zhuhai Engineering Investigation Institute of Guangdong Province,Zhuhai 519000,China)

机构地区：[1]沈阳建筑大学材料科学与工程学院,沈阳110000 [2]广东省珠海工程勘察院,珠海519000

出　　处：《硅酸盐通报》2024年第10期3534-3540,3551,共8页Bulletin of the Chinese Ceramic Society

基　　金：辽宁省教育基金服务地方项目(lnfw201909)。

摘　　要：本文探究了D-异抗坏血酸钠对硫氧镁水泥凝结时间、电导率、抗压强度和耐水性能影响,通过X射线衍射、同步热分析和扫描电子显微镜测试对硫氧镁水泥水化产物的物相组成及微观结构进行表征和分析。结果表明:加入化学添加剂D-异抗坏血酸钠能大幅度延长硫氧镁水泥的凝结时间;改性后的硫氧镁水泥中有大量5Mg(OH)_(2)·MgSO_(4)·7H_(2)O(5·1·7)晶相生成,能大幅度提高硫氧镁水泥的抗压强度和耐水性能。The effect of D-sodium erythorbate on the setting time,conductivity,compressive strength,and water resistance of magnesium oxysulfate cement was investigated.The phase composition and microstructure of hydration products of magnesium oxysulfate cement were analyzed using X-ray diffraction,synchronous thermal analysis,and scanning electron microscopy.The results show that the addition of chemical additive D-sodium erythorbate significantly prolongs the setting time of magnesium oxysulfate cement.Additionally,the formation of a substantial amount of 5Mg(OH)_(2)·MgSO_(4)·7H_(2)O(5·1·7)crystalline phase greatly improves the compressive strength and water resistance of magnesium oxysulfate cement.

关 键 词：硫氧镁水泥 D-异抗坏血酸钠 凝结时间 5·1·7相 抗压强度 耐水性能 

分 类 号：TQ177.5[化学工程—硅酸盐工业]